Milling-machine



(No Model.) 2 Sheets-Sheet 1.

P. J. KELLY. MILLING'MAGHINE.

No. 462,050. Patented 0013. 27, 1891.

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(No Model.) 2 SheetsSheet 2'.

P. J. KELLY.

MILLING MACHINE.

No. 462,050. Patent edOoiz, 27,1891.

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PATRICK J. KELLY, OF ELIZABETH, NE\V JERSEY.

MlLLlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 462,050, dated October27, 1891.

Application filed December 16, 1890. Serial No. 374,868. (No model.)

To aZZ whont it may concern;

Be it known that I, PATRICK J. KELLY, of Elizabeth, in the county ofUnion and State of New Jersey, have invented a new and usefulImprovement in Milling-Machines, of which the following is aspecification.

My invention relates to an improvement in milling-machines, and moreparticularly to means in connection with such machines for feeding thearticle orinaterial to be operated upon to the cutters and to means foradjusting the cutters themselves.

A practical embodiment of my invention is represented in theaccompanying drawings,

in which- Figure 1 is a View of the machine in side elevatlon. Fig. 2 isa View of the same in front or end elevation. Fig. 3 is an enlargedsectional view in detail of the cutter-heads and cutters. Fig. 1 is anenlarged end view in detail of one of the cutter-heads, with cutters inposition; and Fig. 5 is a transverse section in detail through the feedscrew frame and upper portion of the work-support between the offsetswhich embrace the feedscrew.

A represents the pedestal or supporting frame provided withupwardly-extending ears or standards a, in which the revolvingcuttershaft B is journaled. The said standards a are also convenientlyprovided with forwardly-extending arms ct',in which the drive-shaft C isjournaled, the two shafts B and O preferably extending parallel witheach other, and in a direction transverse to that in which the articleto be operated upon is to be fed. The shaft B has fixed thereon a pairof cutter-heads D and D, spaced apart conveniently by means of anintervening sleeve (1, and forced snugly against a shoulder Z) on theshaft B by means of an adj Listing-nut I), working upon the threadedportion 19 of the shaft B. The cutter-heads D and D arehere shown aslocated on that portion of the shaft B to one side of thesupporting-standards a, and the free end of the shaftBoutside of thecutter-head D is supported in a hanger a seinafter more fully explained.Extending from front to rear in adirection transverse to that in whichthe cutter-shaft B extends 1s a feed-screw F, journaled in suitablebearings in a framef, fixed to the side of the pedestal or main frame A.The position of the feedscrew F and its supporting-frame is a shortdistance to one side of the vertical plane of the inner cutter-head D,soas to leave a free space for the travel of the article or material beingoperated upon between the two cutterheads. The feedscrew F ishere shownas operated by means of a worm-wheel f,secured near its front end andadapted to interniesh With a worm g on a worm-shaft G, the latter beingjournaled in suitable bearings across the front of the machine andprovided with a drive pulley g, driven by a belt 9 leading to adrivewheel 13 secured on the end of the shaft B.

The worm-shaft G is so mounted that it may be swung into and out of gearwith the wormwheel f, the swinging of said shaft being accomplished inthe present instance by means of a crank-rod H, provided with a crank h,

the latter connected with the shaft G by a connecting-rod h. A crank ffixed on the end of the feed-screw shaft, enables the feedscrew to berotated by hand when the worm G is thrown out of engagement with theworm- Wheel f.

A frame for supporting the material or article to be operated uponconsists in the pres ent instance of an upper section K and a lowersection K, the two sections being con- 8 5 nected with each other insuch a manner that the lower section K may be adjusted vertically tolengthen and shorten the frame as a Whole. The adjustment is here shownas accomplished by means of bolts 7t, extending 0 through the upperportion of the section K and through elongated slots 71' in the lowerportion of the upper section K, the bolts being provided with clamping-nuts 70 The upper section K has a sliding engagement with 5 Betweenthe lugs or turning it.

the nut will thereby be caused to travel on the screw, and by itsengagement with the supporting-lugs k will cause the frame K K to travelalong the screw. The frame K K, which I have represented herein, isparticularly well adapted for the support of radiatorsections or otherarticles, upon both sides of which it is desirable to operatesimultaneously. To this end the foot of the frame-section K is providedwith a pair of draw-bolts L, carrying upon their free ends aclampingplate Z,'preferably of angular form in crosssection, as shown,and corresponding to the angular foot-piece Z on the section K. By thismeans the foot of the radiator-section or other article supported uponthe frame may be tightly clamped to the movable supporting-frame. Theupper section K of the movable supporting-frame is provided with a pairof bosses M, projecting outwardly from its upper portion, from orthrough which screws m project and form supports for a clampingplate m.

Tail-nuts m on the screws on serve to force the clamping-plate m intocontact with the upper portion of the article to be operated upon and tohold it snugly in position while being engaged by the cutters. Thearticle to be operated upon when clamped in the movable supporting-frameK K is fed by the mechanism hereinbefore described, rearwardly, itsopposite faces to be operated being thereby brought into engagement withthe cutters upon the adjacent faces of the cutter-heads D D. The movableframe K K may be returned from between the cutters by throwing the wormg on the worm-shaft G out of gear with the worm-wheel f and turning thescrew in the opposite direction by means of the hand-crank]? Thecutter-heads D D, hereinbefore referred to, are preferably formed ofcast-iron and are provided at intervals on their peripheries withtransverse recesses N to receive the shanks n of the cutters. Thecutters are preferably formed of what is commonly known as Mushet steel.The ends of the cutter-heads opposite those from which the cutting endsof the cutters project are reduced in size, as shown at O, and areprovided with screw-threads 0, on which works a circular nut P, providedwith recesses 19 for The rear ends of the shanks n of the cutters abutagainst the inner face on the ring-nut P, and hence the several cutterslocated in the transverse recesses in the periphery of the cutter-headmay be simultaneously forced forward with the greatest precision byturning the nut P.

To hold the several cutters firmly in their position, a ring Q isprovided,which surrounds the front portion of the cutter-head and theseveral cuttershanks seated therein, and is held in position on thecutter-head by means of screw q, for instance, extending through thering and-tapped into the cutter-head. Through the ring Q set-screws qextend and bear against the backs of the cutter-shanks, holding themfirmly in their seats. By the above adjustment the time and laborrequired in drifting the cutters outwardly one at a time, and thesubsequent regulating of their cutting-faces by grinding or other means,is avoided, and the adjustment may be accurately made with great nicety.

The cutter-shaft B is provided witha spurwheel R, fixed thereon, whichis driven by a pinion r, fixed on the drive-shaft O, the driveshaft Gbeing provided between the supports a with a cone-pulley r for varyingthe speed,

as is usual. A beltSfrom a source of power not shown engages the pulleyr to actuate the machine.

What I claim is 1. In a milling-machine, the combination, with thecutters and means for actuating them, of a feed-screw, means foractuating the screw, a Work-supportdepending from the feed-screw frameand provided with lugs or cars, which embrace the feed-screw and have afree sliding movement thereon, and a nut having an engagement with thefeedscrew between the said lugs or ears for moving the work-supportalong the feed-screw toward and away. from the cutting mechanism,substantially as set forth.

2. In a milling-machine, the combination, with the cutting mechanism andmeans for actuating it, of the feed-screw, means for operating it, asectional work-support depending from the feed-screw frame, one of thesections being vertically adjustable upon the other section, the saidwork-support being provided with lugs or ears which embrace thefeed-screw and have a free sliding movement thereon, a traveling nut onthe feedscrew between the lugs or ears for operating the work-support,and clamping devices for securing the work to the work-support,substantially as set forth.

3. The cutter-head comprising the cylindrical body portion provided atintervals on its periphery with recesses extending transversely acrossit, the rear portion of the head being reduced and provided with ascrewthread, cutters seated in the transverse recesses, a ring-nutengaged with the reduced screw-threaded portion of the head with itsside-in position to engage the ends of the seated cutter-shanks, a ringsurrounding the larger portion of the cutter-head at the face from whichthe cutters project, and set-screws extending through the ring intoposition to lock the cutters against longitudinal displacement,substantially as set forth.

PATRICK J. KELLY.

Vitnesses:

J. C. GoNNoLLY, D. SCHLEIMER.

